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Questions tagged [hyperledger-fabric]

Hyperledger Fabric is an implementation of blockchain technology. Use this tag for questions about this project.

Use this tag for questions about this project.

Another good idea is to reach out to the community at

Documentation can be found at

Refer development lifecycle and officially provided resources at

6206 questions
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Difference between users in hyperledger fabric and participants in hyperledger composer

Hello I am new to both HyperLedger Fabric and composer.I got confused with two terms. one is user in HyperLedger Fabric and another is participant in HyperLedger Composer.We have a set of users(including one administrator) in each organization along…
Vankam Sree Hari
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Hyperledger Composer vs Hyperledger Nodejs Api

I am new to hyperledger and bit confused about hyperledger composer & nodejs api. I saw using composer we can create assets, transactions, participants and chaincode and in last we have to archive it this all into .bna file and finally we deploy…
zubair
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chaincode in hyperledger composer vs chaincode in hyperleger fabric?

does same functionality can be achieved by writing chaincode with javascript in hyperledger composer as writing chaincode with go in Hyperledger fabric? and What are the limitations and benefits of writing chaincode in JS as compared to writing in…
himanshu_chawla
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visibility settings for input data on chaincode

In the Fabric-FAQ on the Data Privacy and Access Control section it is noted: within a channel you can restrict the input data to chaincode to the set of endorsers only, by using visibility settings. The visibility setting will determine whether…
psebos
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Does Orderer have Block(Ledger) data?

I built hyperledger fabric network using Kafka-based Ordering Service. I thought that Orderer doesn't have Block data. But, when I checked /var/hyperledger/production/orderer/chains/mychannel in Orderer server, I found blockfile_000000 file. I…
dr_devbc
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Difference between Fabric CA server and CA Client

What are the functions of the Fabric CA Server and Fabric CA Client? What are the Roles of the Fabric CA Server and Fabric CA Client? Thanks
Charmy Garg
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Unimplemented desc = unknown service protos.ChaincodeSupport

When I start orderer、peer node ， then I start the example01.go to instantiate the chaincode , and specify : peer.address 192.168.120.189:7051 chaincode.id.name simple-token:1.0.0 the main code from example01.go is: func main() { …
Jim Green
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Hyperledger Fabric Client Registration failed

I am new to Hyperledger Fabric and i am trying to register the fabric client with the server locally. here is what i have done so far. go get -u github.com/hyperledger/fabric-ca/cmd/... fabric-ca-server start -b admin:adminpw after that i got the…
Akash Sethi
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What is the relation between `Fabric`, `Composer`, `Cello` and other Hyperledger applications?

When I was tasting the fabric, I found many other blockchain projects, like Composer, Cello, Explorer. They are all belong to Hyperledger. I'm very confused that there are so many projects. Should I learn all of them? It seems each project plays a…
blackdog
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How can I add the Hyperledger Fabric explorer to the "Hyperledger composer" environment

As I understand, the Hyperledger composer environment runs on a Hyperledger Fabric v1.0 (or 0.8?) blockchain. Beside the REST server to interact with the blockchain or see the transaction, participants etc. is is possible to see which transactions…
PiiiZH
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Ledger encryption in Hyperledger Fabric 1.0

I am analyzing various attack vectors, including a successful attempt by a malicious party to take over one of Fabric peers and thus, owning a local copy of world state and blockchain ledger. Is there a native (configurable) option that would allow…
99hardforks
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Hyperledger Fabric peer container cannot communicate with couchdb container

I am trying to configure hyperledger fabric network. I run three zookeepers, three kafkas, three orderers and a couchdb. They are docker containers and work well. All containers are in the same docker network called ibknet. After that, I run peer…
user6103114
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How does an end user get their certificates in Hyperledger Fabric?

I am new to hyperledger and have been reading the documentation and playing around with the sample codes. I am a bit confused on how the registration/enrollement/authentication of new users is done in hyperledger. I hope someone could clarify these…
Nabil
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How to upgrade a chaincode after modification?

I am new to hyperledger and is going through the example here . I am tried to play around the chaincode but is now stuck at the part where I am suppose to upgrade the chaincode I have tried to execute the peer chaincode upgrade within the docker…
user3500286
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Cannot create container for hyperledger service

I have a docker-compose.yaml file defining 5 services: orderer.example.com peer0.org1.example.com peer1.org1.example.com peer0.org2.example.com peer1.org2.example.com Running the docker-compose -f docker-compose.yaml up -d command results…
jpsstack
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